SKKH 4.2

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4-2 How minerals form

Vocabulary

solution-a mixture in which one substance is dissolved in another
vein-a narrow slab of a mineral that is sharply different from the surrounding rock

Outline

Process That Form Minerals

  • Crystals form in two ways :through crystallization of melted materials and through crystallization of materials dissolved in water.Crystallization is the process by which atoms are arranged to form a material with a crystal structure.

Minerals From Magma

  • The size of crystals depends on these four things: rate at which magma cools,amount of gas the magma contains, and the chemical composition of the magma. Magma deep below the surface cools down slowly over many thousands of years, so it produces large creation. Magma closer to the surface cools down more rapidly ,so it produces small crystals.



Minerals From Hot Water Solutions

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THIS DIAGRAM SHOWS ONE PROCESS BY WHICH MINERALS ARE FORMED



Minerals Formed by Evaporation

  • Minerals form when solutions evaporate. One example of this type are halite deposits in the United States.

Where Minerals Are Found